期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 68, 期 7-8, 页码 1637-1643出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2008.02.026
关键词
nano composites; compressive strength, tensile strength; modeling; vacuum assisted resin transfer molding (VARTM)
A technique was developed to improve the strength of unidirectional composites by enhancing the matrix properties through nanoparticles infusion. A commercially available standard DGEBA epoxy with silica nanoparticles (Nanopox F 400) was used as the matrix to make fiber composites. The silica nanoparticles in Nanopox were grown in situ via a sol-gel process resulting in a concentration of 40 wt% which was later diluted to 15 wt% particle loading. TEM images showed very uniform dispersion of silica nanoparticles with a size distribution of about 20 nm. Compression test revealed a substantial improvement (40%) in elastic modulus of the modified epoxy. A modified vacuum assisted resin transfer molding process was used to fabricate unidirectional E-glass fiber reinforced silica/epoxy nanocomposites. Inclusion of silica nanoparticles dramatically increased the longitudinal compressive strength and moderately increased the longitudinal and transverse tensile strengths. A microbuckling model was used to verify the compression testing results. (c) 2008 Elsevier Ltd. All rights reserved.
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